Evening Landscape-Peasants and Mounted Figures Thomas Gainsborough (1727-1788)

The picture has something of this: tree, landscape, people, dawn, group, environment, backlit, cavalry, outdoors, silhouette, scenic, sunset, park, evening.
Perhaps it’s a painting of a group of people riding horses in a wooded area with a river in the foreground and a man on horseback in the background.